001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.iso;
020
021
022/**
023 * A no-operation ISOFieldPackager; used as a placeholder for fields that require no packing/unpacking.
024 * @author apr@cs.com.uy, dflc@cs.com.uy
025 * @version $Id$
026 * @see ISOComponent
027 * @see IFA_LLNUM
028 */
029public class IF_NOP extends ISOFieldPackager {
030    /** Default constructor. */
031    public IF_NOP () {
032        super(0, "<dummy>");
033    }
034
035    /**
036     * Constructs a packager with the given length and description.
037     * @param len - field len
038     * @param description symbolic descrption
039     */
040    public IF_NOP (int len, String description) {
041        super(len, description);
042    }
043    /**
044     * @param c - a component
045     * @return packed component
046     */
047    public byte[] pack (ISOComponent c) {
048        return new byte[0];
049    }
050    /**
051     * @param c - the Component to unpack
052     * @param b - binary image
053     * @param offset - starting offset within the binary image
054     * @return consumed bytes
055     */
056    public int unpack (ISOComponent c, byte[] b, int offset) {
057        return 0;
058    }
059    public int getMaxPackedLength() {
060        return 0;
061    }
062}